Lens-dressing machine.



J. N. -& J. AINSLEY."

LENS DRESSING MACHINE.

APPLICATION FILED JAN. 13. 1914.

1,202,013. Patented Oct. 24,1916.

2 SHEETS-SHEET I. 11 91.

2025271 eases 7 ZFzuerzTors WMZZZJ14 J. N. & J. AINSLEY.

LENS DRESSING MACHINE.

APPLICATION FILED JAN. 13, 1914.

1 292,01 3 I Patented Oct. 24, 1916.

2 SHEETS-SHEET 2.

drivin mechanism.

JOHN NICHOL AINSLEY AND JOSEPH AINSLEY, 0F SHELBYVILLE, IN'DIAITA.

LENS-DRESSING MACHINE.

Specification of Letters Eatent.

Application filed Ianuarylit, 1914. Serial No.

oall whom it may concern:

Be it known that we, JOHN N. Amsnnr and J osnrir AINSLEY, citizens or the United States, residing at Shelbyville, in the county of Shelby and State of Indiana, have in vented certain new'and usei'ul Improvements in Lens-Dressing Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to an improvement in lens grinding and dressing. machines.

The primary object of the invention is to provide an abrading and dressing machine 1 icl: will give the convex face of the lens a uniform dressing without the necessity of periodically adjusting the chuck support for the lens and in which the entire convex surface \vill'be dressed by the abrading element.

A further object of the invention is to provide an apparatus of this character which includes a floating abrading member which is constantly driven while the apparatus is in operation.

Another object of the invention is to provide a construction in which the supporting chuck for the lens will be at all times pressed in contact with the abrading element, an in which said chuck will be rotated while the abrading element is in contact with the lens.

A further object of the invention is to provide a structure which includes an abrading element which is mounted to rotate, a. sup porting structure for the lens which is also mounted to rotate, the lens supporting structure rotating in a plane at right angles to that of the abrading element, the arrangement being such that all of the driven elements are driven from a common Another object of the invention is to provide a lens supporting structure which may be manually moved into and out of contact with the abrading element whereby the lens may be inspected, without disengaging the clutch which constitutes a part of thev lens supporting structure or disarranging the In the drawings: Figure 1 is a frontelevation, the position that the lens support assumes at dilierent times being indicated. in dotted lines, Fig. 2 a vertical section, Fig. 3 a detailed view of the lens chuck, and Fig. 4 a section on the section Fig. 1 showing the manner drive belt for the abrading abrading wheel are supported eral movement.

in which the wheel and the against lata third guide block drive shaft. g

-. to the cross line indicated on in the drawings 10 designates a support-- ing frame which includes the vertical standards 11 which are connected by the cross beam 12. These standards are alsoconnested intermediate their ends by the vertic-ally spaced cross beam 13. A second series of vertical standards 16 are disposed parallel with the standards 11. These standards 16 are shorter than the standards 11 and are connected adjacent their upper ends by cross beams 17 and 18. The standards 11 adjacent by cross beams 19 beneath which are mounted the transversely disposed blocks 20 A drive shaft 21 is mounted on the blocks 20 in bearings 22, receiving power from any suitable source through the belt 23 which passes over the sheave 2% arranged on the shaft. A. main drive pulley or sheave 25 is mounted on the shaft 21 intermediate the bearings 22. Immediately above the shaft 21 and supported on the cross beam 13 is a bearing block. 26. The bearing 27 is arranged on this block and journaled for rotation in said bearing is'a flanged roller 28. A hoop or ring 29 which constitutes the abrading element or the support for the same is supported by this roller. This hoop may be formed of any suitable material and its periphery is cut or rabbeted to provide the rib 30 which engages between-the flanges oi the supporting roller. A guide block 31 is supported by each of the vertical standards 11, there. being 32 supported by the cross beam 12. These guide blocks consist oi a base plate 33 from which projectfiners 3% there being two fingers arranged on each side of the plate and spaced transversely oi the plate a suflicient distance to engage over the sides of the peripheral rim of the hoop 29 whereby the blocks 006perate with the roller to assure of the proper centering of the hoop should the same have a tendency to skew out of a plane parallel beams of the frame. A third series of standards 35 are arranged parallel with the standards 11 and 16 and this third set of standards are connected at their upper terminals by the cross beam 36 which supports the bearing 37. The shaft 88 is supported by this hearing, this shaft being driven by a belt 39 which passes over a sheave a0 arranged-on the shaft 21 and a sheave 41 arranged on the shaft 38. Thecross beam which connects the upper termi- Patented (Pct. 2d, 1916.

their base are connected nals of the standards 16 supports at its center a bearing block 42 which is rectangular and which extends above the beam. This bearing. block is formed with a central aperture through which the shaft 38 passes there being a pinion 43 arranged on the terminal of the shaft beyond the bearing block. A plate 44 which is of the same size and design as the bearing plate or block 42 is loosely mounted on the shaft 38 being spaced from the pinion 43 by a'collar 45. This plate 44 carries at points adjacent its top and bottom bearings 46 in which is rotatably mounted a shaft or spindle 47, freely passing through the bearings, whereby it may not only rotate with respect to the bearings but simultaneously With such rotation, reciprocate with respect thcreto.- A collar 48 is mounted on the lower terminal of the spindle whereby the movementof the spindle entirely through the bearings is prevented. The lower end of the spindle is provided with a key way 49 and mounted on the spindle intermediate the bearings 46 is a pinion 49. This pinion carries a boss 50 through which a set screw 51 passes, the set screw entering the key way formed in the spindle. Thus the pinion 49 rotates with the spindle yet at the same time may remain stationary when the spindle reciprocates. A coiled spring 51 embraces the spindle and arranged on the spindle in spaced relation with respect to the pinion 45) is a collar 52 one of the terminal convolutions of the spring 51 contacting with said collar its other terminal convolution contacting with the pinion 49. The spring 51 there" fore constantly exerts pressure on the collar 52 to press the spindle outwardly toward the ring 29.

A lens chuck 53, illustrated in detail in Fig. 3, is mounted on the upper terminal of the spindle 47. This chuck includes a series of radially extending slotted arms 54 in which are mounted for sliding movement the lens engaging fingers 55. The bases of these fingers slide longitudinally of the arms 54, the fingers being provided with the right angle extensions 56, notched terminally as at 57 to engage the lens 58 whereby its convex surface 'may be opposed to the inner surface of the abrading hoop or band 29. A bar 5.) is secured to one of the lowercorners of the plate 44 extending parallel with the adjacent side edge of the plate to a point adjacent the lower portion of the supporting frame. This bar is pro vided with an elongated slot which extends entirely throughout its length. Mounted on the parallel longitudinal beams 17-17 of the frame are bearings 60 which support a shaft 61. On one terminal of this shaft is arranged a sheave 61 and adjacent this sheaye ismounted a sprocketf l eel'62.

A shaft 63 is supported by bear-msg 1 141: 9.1-;

ranged in spaced relation with respect to the bearings (50. A sprocket wheel (35 is mounted on this shaft and on the terminal of the shaft remote from the sprocket wheel 65 is arranged a disk '66. A sprocket chaii (37 connects the by the rotation of the shaft 61 through the medium of the drive belt (31 which passes over the sheave mounted on the shaft 61 is transmitted to the shaft 63. A link 68 is mounted on the disk (36,said link extending radially from the disk and carrying a pin (39 which plays in the elongated slot of the bar 59. Therefore as the disk rotates as indicated in Fig. l the arm 68 will swing the plate 44 on its pivot, carrying with it the spindle and the lens supporting chuck.

A drive belt 70 passes over the sheave 25 which is mounted on the shaft 21 and embraces the hoop 29. This drive belt 70 contacts with the rib formed on the periphery of the ring and is of such a tension as to draw the hoop in contact with the hoop supporting roller 28. Particular attention is directed to this manner of mounting the hoop 2!) as the hanging means for the hoop constitutes such a support that the hoop 1s permitted to move in vertical direction independently of any supporting means or bearings therefor. thereby providing the necessary flexible engagement of the hoop with the lens to be dressed. It will be understood that while the hoop is permitted to participate in this floating action it is efl'ectually guided against skewing by the guides 3132 and the flanges of the roller 28.

In operation the lens is placed in a position to be engaged by the fingers 56 and the set screws 56 tightened to bring the fingers into clamping engagement with the lens. Assuming that the plate 44 is in a vertical position, that is as indicated in Fig. 1 the pressure exerted by the coiled spring 51 against the collar carries the spindle 47 upward and brings the lens into engagement with the inner face of the hoop 29. The in ner face -of this hoop may be covered with any suitable abrading or dressing material which contacts with and dresses the lens 58. As the wheel 29 is driven by means of a belt 70 to cause this dressing of the lens the shaft 38 will also be driven from the main drive shaft 21 by means of the belt 39. The pinion 43 which is mounted on the shaft 48 meshes with thepinion 49 arranged on the spindle 47 and thus consonant with the driving of the abrading hoop the spindle which supports the lens will also be rotated. The lens therefore will be whirled about during the travel of the abrading element over the same, being maintained in contact with the abrading element by the action of the spring 51.

' During the rotation of the spindle 47 the spindle supporting plate will be rocked on the shaft 38 the link 68 carried by the crank sprockets 62 and 65 where disk 66 'causing this rocking of the plate through the arm 68. As the plate is rocked the lens will move to and fro over the abrading surface whereby the entire convex surface of the lens will be treated. The timing of thisto and fro motion of the lens supporting mechan m with respect to the driving of the spi .dle and the driving of the abrading hoop may beaccurately regulated so as to secure the proper dressing and abrading of the lens. Thus when power is applied to the shaft 21 the shafts 38 61 and naled in said frame,

v tatably mounted 63 will be simultaneously driven, giving two distinctly different movements to the lens, that is the to and fro motion as well as the rotary motion, the driving of the belt 70 also rotating the hoop 29.

The many advantages of a mechanism of this character will be clearly apparent as it will be noted that the same gives the lens a complete and uniform dressing without the necessity of adjusting the various parts of the machine during the dressing operation.

It will also be noted that the entire struc ture is such as may be easily and economically manufactured and that the various parts may be readily assembled.-

What we claim is:

1. A lens dressing machine including a supporting frame, a main drive shaft joura roller mounted vin the frame, a hoop constituting an abrading member engaging the roller, supports'carried by the frame and contacting with said hoop, means for driving said hoop through the medium of said drive shaft, a shaft roin the frame, means for driving said shaft from the first mentioned shaft, a plate rotatably mounted on the second mentioned shaft, a plurality of bearing s carried by said plate, a spindle journaled in said bearings and supported to move longitudinally with respect thereto, means for driving said spindle through the medium of the second mentioned shaft, a

I lens chuck arranged on said spindle whereby disposed to yield in one a lens may be supported in the path of the abrading member, and means for normally projecting the spindle toward the abrading member.

"2. A lens dressing machine including a supporting frame, a hoop the inner face of which is provided with ab-rading material, a roller carried by the frame, and ing with said hoop, guides carried by the frame and embracing the sides of the hoop, means for rotating the hoop, a shaft ported by the frame and rojecting within the hoop, means for rotating said shaft, a plate mounted on the shaft and rotatable with respect thereto, a pinion arranged on the shaft, a spindle mountedfto move longitudinally with respect to the plate, a sleeve arranged on the spindle, the spindle being direction through said holder, means contactsupthe sleeve, a pinion carried by the sleeve and driven by means for rotating the plate with respect to the spindle, and a lens carrier supported by the spindle.

3. A lens dressing machine including a supporting frame, a roller mounted on said frame, a hoop the periphery of which is provided with a rib, said rib contacting with said roller, the roller being flanged to embrace the sides of the rib, a plurality of blocks supported by the frame and formed with guiding sides of the peripheral rib of the hoop, a pivoted lens carrier arranged within the hoop, the inner face of thehoop carryingabrading material, means for forcing the lens carrier towardthe hoop, rotating the lens carrier.

4. In a lens dressing machine, an abrading' hoop, means for rotating the same, a

the first mentioned pinion,

fingers which embrace theand means for lens holder mounted within the open po r' into operative" relation with the 5. A lens dressing machine including an abrading member, a lens holder mounted for longitudinaland rotary movement on saidsupport, means for rotating saidlens holder, a rotary abrading member, spring means for normally projecting the lens holder toward said abrading member, and automatic means for tilta pivoted lens support,

ing the lens holder on its pivot during the rotation thereof to present different surfaces of the lens to the rotating abrading' I member independently the holder.

6. In a lens dressing machine, an abrading hoop, means for rotating the same, a

.lensholder mounted within the open pora shiftable support for for shifting, said support to correspondingly shift the lens holder and gearing arranged adjacent the pivotal point of the support for rotating holder independently of the position of the support. P

7. A lens dressing machine, including a pivoted support, a lens holder mounted for longitudinal and rotaryvmovement on said support, a bevel gear arranged on said lens holder, a gearing tion of said hoop,

mechanism cooperating with said bevel gear for rotating the holder, at

the lens of the position of rotating abrading member and means acting automatically for normally projecting and maintaining the lens holder in operating relation'with said abrading member, an

uneans comprising a slotted arm carried by our signatures in the presence of two witthe lens support and adapted to be driven nesses. by a rotary shaft adjacent thereto for mov JOHN NICHOL AINSLEY. 111 the support durlng the rotary movem nt of the. lens holder to present different JOSEPH AINSLEY surfaces of the lens carried thereby tothe Witnesses: gbrading Wheel. VVILLIAM A. MILLER,

" In testimony whereof we hereunto aflix HARRY E. ROTH. 

